Bugs item #779191, was opened at 2003-07-29 00:32
Message generated for change (Comment added) made by birkenfeld
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Category: Python Library
>Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Selim Tuvi (stuvi)
Assigned to: Nobody/Anonymous (nobody)
Summary: BasicModuleLoader behaviour in Python 2.3c2
Initial Comment:
Hi I am using the BasicModuleLoader class from the
ihooks module and noticed that it behaves differently
based on whether it is used from a script vs. from the
Python command line. Here is the transcript of my
session:
C:\projects\Online\repos>type testModule.py
C:\projects\Online\repos>cd ..\testsuite
C:\projects\Online\testsuite>type impTest.py
from ihooks import BasicModuleLoader
import os
os.chdir('../repos')
ml = BasicModuleLoader()
modstuff = ml.find_module('testModule')
print modstuff
C:\projects\Online\testsuite>python impTest.py
None
C:\projects\Online\testsuite>python
Python 2.3c2 (#45, Jul 24 2003, 21:23:54) [MSC v.1200
32 bit (Intel)] on win32
Type "help", "copyright", "credits" or
"license" for more
information.
>>> from ihooks import BasicModuleLoader
>>> import os
>>> os.chdir('../repos')
>>> ml = BasicModuleLoader()
>>> modstuff = ml.find_module('testModule')
>>> print modstuff
(<open file 'testModule.py', mode 'U' at
0x008E8F20>, 'testModule.py', ('.py', '
U', 1))
>>> ^Z
C:\projects\Online\testsuite>cd ..\repos
C:\projects\Online\repos>python ..\testsuite\impTest.py
(<open file 'C:\projects\Online\repos\testModule.py',
mode 'U' at 0x008E7F20>, '
C:\projects\Online\repos\testModule.py', ('.py', 'U',
1))
C:\projects\Online\repos>
Explanation of the above session:
I created an empty module called testModule.py and
stored it in c:\projects\Online\repos. Then I wrote the
impTest.py script that tries to import it through the
BasicModuleLoader. The impTest.py script resides in
c:\projects\Online\testsuite directory. If I run the script
from the testsuite directory it fails to find the module. If
while I am in the testsuite directory I enter the contents
of the impTest.py using the Python command line then it
finds the module. Also if I run the impTest.py while I am
in the repos directory then it finds it as well. In Python
2.2 this had worked in every case.
----------------------------------------------------------------------
>Comment By: Reinhold Birkenfeld (birkenfeld)
Date: 2005-06-01 13:27
Message:
Logged In: YES
user_id=1188172
This is not a fault in ihooks but in the imp module; ihooks
just uses this.
The difference is that in the interactive interpreter,
sys.path contains an empty string (which is equivalent to
the current directory), while when executing a file,
sys.path contains the absolute path to the .py file. So the
path you chdir'd to is not on the module search list.
I don't know if that's intended behaviour.
----------------------------------------------------------------------
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